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The 1950 and 1951 Thermopiles (pilot generators) are designed for use on self-powered gas control systems. They can be used to replace all Robertshaw and similar competitive devices. Models are available for two lead or coaxial type connection. All models include mounting nuts. 1950's are also known as TP-75. 1951's are also known as CP-2 500-600 millivolts.

Having problems turning my fireplace on. Suspect the wall switch and thermopile. The thermopile has an unloaded output of 320 millivolts (those in your catalog were 600-750 mv). Can I receive info on installing a new one. How difficult is it? Also what is the difference between a millivolt switch and a wall switch to control millivolt valve controllers.